Sewing-machine shuttle



May 26, 1925. 1,538,939

E. D. HUME SEWING MACHINE SHUTTLE Filed Aua. 21, 1923 Patented May 26, 1925.

UNITED STATES EDGAR D. HUME-,0]? COLLINGSW'OOID, NEW JE,

COMPANY, OF EAST HAMPTON, CGNNECTICU! lsaataa SEWING--MACI-IINE SHUTTLE.

Application filed. August 21, .1923.

To all whom it may concern Be it known that I, EDGAR D. HUME, a citizen of the United States, residing at Collingswood, in the county of Camden and State of New Jersey, have invented new and useful Improvements in Sewingdllachine Shuttles, of which the following is a specification.

This invention relates to a sewing-ma chine shuttle including abody having a corn tral post, and a bobbin case having a tubular post receiving the central post, as in shuttles oi the Singer C. B. and other types.

The object of the invention is to provide the shuttle with improved means for controlling a bobbin of the ready-wound type in serted in the bobbin case, in such manner as to prevent the spinning or overrunning oil the bobbin when the thread is being unwound therefrom, the controlling means being, embodied in an adjunct which is readily applicable to and removable from the shuttle, without requiring change or adaptation of" the latter, and provides -frictional rotation retarding means at opposite ends o1 the bobbin.

it the accompanying drawings forming a part of this specification,

Figure 1 is a sectional view of a shuttle embodying the invention.

Figure 2 is a sectional view of the shuttle body.

Figure 3 is a sectional view of the bobbin case.

Figure 4C is an end view of the bobbin-controlling adjunct shown by Figure 1.

Figure 5 is a section on line 5--5 of Figure 4. V

Figure 6 is a plan View of a modified form of the dished spring shown by Figures 1 and 5.

Figure 7 is a section on line 7 -7 mt Fig ure 6.

The same reference characters indicate the same parts in all of the figures.

The shuttle body 11.2, and the bobbin case 13, are in this instance, of the construction embodied in the well known Singer B. shuttle. The body is provided with a central post 1-1, having an annular shoulder at its base or inner end. The bobbin case is provided with a tubular post 16, which receives the body post 14, the usual or any suitable latch means being provided tor releasably securing the bobbnr case to the body Serial 1310., 653,495.

post. I have not described said means, the same forming no part of the invention.

My improved bobbincontrolling adjunct is embodied as next described. 17 represents an inner sleeve loosely surrounding and adapted to rotate on the tubular post 16, and on the periphery of the annular shoulder 15 of the central post 14. Said sleeve is pro vided at its inn *r end with an annular flange 18, which bears on the portion 20 of the shuttle body surrounding the shoulder 15, said portion being hereinafter called a seat.

21 represents a stop collar, embracing and adapted to rotate with the sleeve 17, the said collar being preferably a thin strip of spring steel adapted to nearly surround the sleeve 17, and to lrictionally engage and rotate with the latter. The collar therefore has ends separated by an opening at 22, as shown by Figure 4. Thecollar is formed to closely tit and trictionally engage the internal sur- TEI'CQ ot' a cop tube 23, said tube and a thread winding 24 thereon constituting the well lrnown'ready or universally wound bobbin. The sleeve 17 and the stop collar 21 are, therefore, adapted to rotate with the bobbin.

25 represents a centrally apcrtured flat dis which surrounds and is freely movable on the sleeve 17, between the flange 18 and the stop collar 21. i

A dished spring is interposed between the flange 18 and the disk 25. Said spring is preferably a spirally coiled wire spring 26, having acontracted central or inner convolution bearing on the flange, and an enlarged marginal or outer convolution hearing on the disk.

When the parts are assembled, as shown by Figure 1, the spring 26 acts in opposite directions and presses the sleeve flange 18 inwardly against the seat portion 20, and the disk outwardly against the inner end of the bobbin, so that the outer end of the bobbin is pressed against the head, or closed end of the bobbin case.

The stop collar 21 is arranged to be out of contact with the disk 25, shown by Figure 1, when the parts are assembled, and a' bobbin is present, and to contact with the disk and limit the movement thereof by the spring, as shown by Figure 5, in the absence of a bobbin.

The elements of the described adjunct are confined in assembled relation when the adjunctis removed from the shuttle, by the flange 1 8 and the stop collar 21, so that the adjunct may be applied and removed as a unit, without liability of accidental separation of its elements.

It will be seen that spinning or overrunning of the bobbin is opposed at both ends of the bobbin, by the frictional contact of the tube flange 18 with the shuttle body, and by the frictional contact of the outer end of the bobbin with the head of the bobbin case.

Theadj-unot is applicable to any shuttle of the general type shown, the adjunct being applied by slipping the sleeve 17 on to the post 14. The bobbin case and a bobbin inserted therein are then applied to the shutt'le body, the cop tube 23 being pressed onto the stop sleeve 21.

A dished spring 26 (Figures 6 and 7) of spider shape, may be used instead of the coiled spring 26.

I claim:

1. In combination, a sewing-machine shuttle body having a central post and a seat surrounding the inner end of the post; a bobbin case having a tubular post receiving the shuttle post; and a bobbin-controlling adjunct including a sleeve loosely surrounding and adapted to rotate on the tubular post, and provided with a flange bearing on said seat, a stop collar embracing and adapted to rotate with the sleeve and formed to closely lit the interior ofa bobbin cop tube, so that the collar is adapted to rotate with the bobbin, a centrally apertured disk surrounding and itreely movable on the sleeve between the said flange and the stop collar, and a dished spring bearing at its central portion on the said flange and at its marginal portion on the disk, the spring acting in opposite directions to press the sleeve flange inwardly against the said seat, and to press the disk outwardly against the inner end of a bobbin, so that the outer end of the bobbin is pressed against the head of the bobbin case, the said stop collar being arranged to be out of contact with said disk when the said adjunct and a bobbin are installed in the shuttle, and to contact with the disk, and limit the movement thereof by the spring in the absence of a bobbin.

2. For use in a shuttle having a central post and a bobbin case having a tubular post; a bobbin-controlling adjunct including a sleeve adapted to rotate on the tubular post and provided with a flange adapted to contact with the shuttle, a stop collar embracing and adapted to rotate with the sleeve, and formed to closely fit the interior of a bobbin cop tube, a centrally apertured disk surrounding and freely movable on the sleeve betweensaid flange and the stop collar, and a dished spring adapted to bear at its central portion on said flange of the sleeve, and bearing at its marginal portion on the disk, the elements of said adjunct being confined in assembled relation by the said flange and stop collar.-

In testimony whereof I have aflixed my signature.

EDGAR 1). HUME. 

